Sash-balance



2 Sheets-Sheet 1.

W. E. SANDFORD.

(ModeL) SASH BALANCE.

No. 362,185. Patented May 3, 1887;

$anw BY ATTORNEYS 2 Sheets-Sheet 2.

W. E. SANDI'ORD.

(Mode1.)

SASH BALANCE.

ATTORNEYS UNITED STATES PATENT OFFICE.

WILLIAM E. SANDFORD, .OF BELLEVILLE, NEW JERSEY.

SASH-BALANCE.

SPECIFICATION forming part of Letters Patent No. 362,185, dated May 3, 1867.

Application filed Apii! 12, 1856. Serial No.108.5l5. lModcl.)

T (LZZ whom it may concern:

Be it known that '1, WILLIAM E. SANDEoRn, a citizen of the United States, residing at Belleville, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Sash-Balances; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this SIJBClfiCZLlJlOIL,

The object of this invention is to provide a substitute for the ordinary sash cords and weights for windows that will in ageneral way overcome the objections arising from their use, and, more specifically, be more durable, sightly, and easily applied to the window.

The invention consists in the improved sashbalance, constructed and the parts thereof arranged and combined substantially as set forth, all substantially as will be hereinafter set forth, and finally embodied in the clauses of the claim.

Referring to the accompanying two sheets of drawings, in which like letters indicate corresponding parts in each of the several figures, Figure 1 Sheet 1, is a side elevation of the improved pulley or balance arranged in connection with the frame andsash. Fig. 2 is a front elevation of the same. Figs. 3 and 4 are side views showing certain parts in detail. Fig. 5, Sheet 2, is a sectional view through line at, showing the sheave, spring, and strap of the device. Fig. 6 is another side View, illustrating a modification in the construction of the device. Fig. 7 is a front view of the same. Fig. 10 is a horizontal section through line y,- and Figs. 8, 9, 11, 12 are detail views, all of which will be hereinafter fully described.

In said drawings, (1 illustrates the sash, b the window-frame, and c a spring-actuated pulley or balance, resembling in some general features those heretofore used. Of said pulley, c is a suitable frame or bed-plate, which may be either of sheet or cast metal. Said frame provides a suitable face-plate, c", to lie flush with the jamb of the frame, and side plates, 0 which extendback at right angles to said face-plate to enter slots in said jamb and provide bearings for a hollow wheel or sheave, d, in which latter is arranged a spring, f, which serves as a counter-bal an cc to the weight ofthe sash. Said spring is secured at one end to said wheel and at the other end to a stationary pivot, e, arranged in bearings c of saidi'sideplates, and on which the said sheave turns. One end of the pivot is angular, and is arranged in a correspondingly angular perforation in the bearings c, to prevent the pivot from turning under the influence of the spring.

To the periphery of the wheel'is secured a metallic strap, s,whieh latter is secured at the other end to the sash at its lower end,as indicated in Figs. 1 and 5, to elevate said sash under the influence of the spring on the hollow sheave.

To cooperate with the spring in holding the sash stationary after the same has been raised, so that it will not fall after the support of the hand has been removed, and yet relieve the sheave from a constant pressure that would counteract thepower of the spring in uplifting the sash, I have provided a friction-brake which acts on the sheave to retard its motion only when there is a downward pressure from the sash brought to bear on the sheave.

To secure the desired result, I form a Vertical slot, f in one of the side plates of the frame or bed of the pulley, and into the same arrange a sliding piece or plate, which bears against or enters into frictional contact with the side of the sheave, and is thereby influenced to move therewith. Said piece or plate 9 has a wedge-like portion, 9, (shown more clearlyin Figs. 2, 4, and 8,) the smaller end of which lies or may lie upward. At the ends of the wedge-like portion of the sliding piece are formed stop projections g g' and between the same is arranged aroller, 7z,which bears on the wedge-likeportion and has a play from the larger to the smaller end of the same as the sliding piece moves in the slot from the corresponding end to the other, as will be understood. On the outside of the slotted plate is secured a binding or resisting plate, at, of

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corresponding movement of the sheave the latter causes the sliding piece to engage in frictional contact therewith to move upward and the roller to pass to the small end of the wedgelike p'ortion,so that the resisting-plate will not exert its power to any considerable degree to retard the action of the sheave and counteract the power of the spring. In the reverse movement of the sash, or when the sash tends to move in the opposite direction, the sliding plate having a wedge-like portion and roller move oppositely, and the roller, passing into contact with thethicker end of the wedge-like portion,binds against the binding or resisting plate, so that its power is exerted to cause the sliding plate or piece to more closely engage the sheave or roller and stop its movement, so that the sash is prevented from falling, except it be influenced by extraneous power, such as that of the hand. To regulate and'control the power ofthe binding or resisting plate, I have provided an adjusting-screw, s, which hasits bearings in the faceplate, as shown in Figs. 1, 6, and 10, the head of the screw being on the outside,so that it may be manipulated without disturbing the pulley. The inner end of the screw is pointed, as shown in Figs. 1 and 3, and engages the resisting plataso that by turning the screw the said plate may be forced toward the wedge-like portion, or be allowed to spring therefrom to reduce or enlarge the space the spring-actuated sheave,of a friction-brake having a sliding piece or plate adapted to enter into frictional contact with the sheave automatically as the latter moves in one direction and allowing a free movement in the opposite direction, substantially as herein described.

2. In a sash-balance, the combination, with a spring-actuated sheave, of a sliding plate or piece having a wedgelike portion arranged at the side of said sheave and adapted. to be brought into frictional contact with said sheave as the latter moves in one direction, and to allow a free'movement in the opposite direction, and a binding or resisting plate, m, all said parts being arranged and combined substantially as and for the purposes set forth.

3. In combination with thespring-actuated sheave of a sash-balance, a plate having a wedge-like portion to enter into frictional contact with the sheave, a roller, and a resisting or binding plate in lieu thereof bearing on said roller, all said parts being arranged and WILLIAM E. SANDFORD.

Vitnesses:

OLIVER DRAKE, FREDK. F. CAMPBELL. 

